Downgrading psp from 4.05 to 4.01 m33-2

Question

my psp cant play games via memory stick so i need to downgraded, but my psp got bricked twice and i am afriad it will again, so i need a way to get it to 3.90 m33-2 or 4.01 m33-2 safely and never mess up again i need help.

will pandora and magic memory stick work? casue i used that twice now for brick. (its my bros psp i need to fix it before he gets back 24 hours only!)

Answer 1

Yes a pandoras battery will fix and downgrade any psp. What a pandoras battery does is put the psp into service mode and, flashes the psp and, reset the firmware to a cfw with the files on a magic memory stick. The reason why psps brick is that their flash files are corrupted or messed with. But !!!!!! If you really want to customize never go over 3.71m33-3 Why? Well the higher u updated the less homebrew apps you get to use